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Dr.-Ing. Reiner Schulz - Wartsila Switzerland Ltd. Sulzer two stroke diesel engines are used as "prime movers" in container ships, bulk carriers and tankers. Such ships need to be in service for as long as possible without stopping for a pre-scheduled overhaul, placing a continuous demand on engine developers in terms of reducing costs and at the same time improving reliability. CFD is a proven tool for minimizing experimental effort during the optimization of receivers, blowers, in-cylinder flow and lubrication systems. Marine Special Report: Read more...
Dan McGreer - Aker Yards Marine Recently, AYM investigated the effect of the propeller rotation direction on the Dynamic Positioning (DP) characteristics of a supply vessel. While general rules of thumb exist to guide designers on the effect of propeller rotation direction, the forces generated while in DP mode will vary depending on the hull form, the location of the skeg, and stern thruster location relative to the propellers. Marine Special Report: Read more...
Dan McGreer, Aker Yards Marine. Carrying cryogenic fluids such as LNG or LPG aboard a ship poses some unique design challenges. The extreme low temperatures of these fluids require low thermal conductivity insulation, and may also necessitate heating in various ship locations to prevent exotic steels from being required throughout the ship’s hull. The accurate determination of the heat transfer between the sea water, outside air, and the cargo is critical to ensure the tank and bulkhead arrangements are feasible. Marine Special Report: Read more...
Dan McGreer - Aker Yards Marine. During two recent projects, Aker Yards Marine was requested to evaluate the impact of different design parameters on vessel performance. The first analysis was to determine whether the location of a ship’s keel coolers had a detrimental effect on propeller inflow, and the second analysis was to determine the impact of skeg geometry on vessel performance. Marine Special Report: Read more...
Dirk Jürgens, Michael Palm - Voith Turbo Schneider Propulsion GmbH & Co. KG, Germany. Milovan Peric, Eberhard Schreck, Dejan Matic - CD-adapco. The optimization of marine vessels requires that the interaction between various ship components and floating positions is taken into account. These interactions make experimental optimization costly and time consuming, often with poor repeatability, or a limited number of data points. With recent developments in computer technology and numerical methods, Computational Fluid Dynamics (CFD) simulation emerges as the more suitable approach. In this...
ROLLA SP Propellers SA was founded in 1980 by Philip Rolla in Switzerland. Since then the company has become the worldwide leader in the design and manufacture of high-speed propellers. Marine Special Report: Read more...
Ji-Hun Jeong & Won-Dae Jeon - CD-adapco Korea The accurate prediction of ship resistance is important for determining the required propulsion power. Due to long lead times in the engine manufacturing process, a suitable power-plant must be selected very early in the ship design process. Consequently, being able to determine the resistance of the vessel and the velocity distribution at the propeller plane is of very great importance in ship design. Marine Special Report: Read more...
Computational Fluid Dynamics (CFD) analysis is fast becoming an essential part of design and performance assessment procedures within the marine industry. With its strategic role in evaluating and applying leading edge technologies for the benefit of its clients and the industry as a whole, Lloyd’s Register has expended considerable effort in verifying and validating CFD technology. Marine Special Report: Read more...
Boris Bućan, Marta Pedišić Buča, Stanislav Ruzić - Brodarski Institut, Croatia. Dejan Matic - CD-adapco. Building on fifty years of experience in shipbuilding science and practice, Brodarski Institut (BI) has achieved a reputation as a leading research and development organization integrated into a pan-European network of similar institutes. After evaluating several commercially available CFD codes, BI chose CD-adapco’s STAR-CCM+ to deliver on-time, on-cost, best in class technology products and services. Marine Special Report: Read more...
Jean-François Sigrist, R&D Engineer - DCN Propulsion, France. The numerical simulation of coupled fluid-structure problems has made tremendous progress over the past few years and various numerical techniques have been implemented in order to describe fluid-structure coupling effects (many numerical examples are given in References 3 and 4). Marine Special Report: Read more...

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